Before the flak jacket, Donzis developed athletic shoes with air chambers filled with air by a built-in pump and acquired a patent on the system in jack wolfskin soft shell jacket 1972. 2 decades later he successfully sued sports shoe maker Reebok for infringing on his patent.

when it marketed its Pump jack wolfskin soft shell jacket men shoe. Donzis also discovered the wrinkle-reducing ease of a chemical compound called beta-glucan, which he marketed to leading cosmetics companies, including Estee Lauder and Betty Kay.

Licensed under the name Nayad, it won favorable reviews: Style journal described it as a movie star natural ingredient of the. He once laid off his pioneer technology for winter jacket sale lacking any social importance whatever, and said his real motivation was

finding an end to cancer. Although that goal eluded him, he was a young and important benefactor of the Sunshine Kids Foundation, a Houston-based charity that supports children with cancer. Donzis was married twice but ski jackets had no children.